package com.example.demo;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.core.env.Environment;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RefreshScope //允许动态刷新配置  
@RestController
public class MyController {

    @Value("${foo}")
    private String from;

    @Autowired
    private Environment env;

    @RequestMapping("/from")
    public String from() {
        return this.from;
    }

    @RequestMapping("/from-env")
    public String fromEnv() {
        //也可以通过env来获取  
        return env.getProperty("foo");
    }

} 